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Abstract

A Gram–straining–negative, facultatively anaerobic, motile by means of a polar flagellum and rod-shaped marine bacterium, designated S4M6, was isolated from surface seawater collected in Dongshan Bay (Fujian, PR China). Phylogenetic analysis based on 16S rRNA genes, phylogenomic analysis of single-copy gene families and whole genome data indicated that S4M6 represented a member of the genus . The closest phylogenetic relatives of S4M6 were CGMCC 1.8994 (97.8 % 16S rRNA gene sequence pairwise similarity), LMG 25438 (96.9 %), SZDIS-1 (96.2 %) and M22 (96.1 %). The growth of S4M6 occurred at 15–35 °C (optimum 28 °C), pH 4.0–9.0 (optimum 5.0–7.0) and in the presence of 2–5 % (w/v) NaCl (optimum 3 %). The predominant fatty acids (>10 %) are C, summed feature 3 (Cω7 and/or Cω6c) and summed feature 8 (Cω7 and/or Cω6). The DNA G+C content of the assembled genomic sequences was 43.4 % for S4M6. Average nucleotide identity (ANI) values between S4M6 and the reference species were lower than the threshold for species delineation (95–96 %); DNA–DNA hybridization further indicated that S4M6 had less than 70 % similarity to its relatives. On the basis of the polyphasic evidence, strain S4M6 is proposed to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is S4M6 (= KCTC 92312= MCCC 1K06167).

Funding
This study was supported by the:
  • Key Technologies Research and Development Program (Award 2021YFC3100503)
    • Principle Award Recipient: WentaoNiu
  • Marine S&T Fund of Fujian Province (Award 2021J05094)
    • Principle Award Recipient: XiaoleiWang
  • National Natural Science Foundation of China (Award 42006085)
    • Principle Award Recipient: XiaoleiWang
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2023-01-18
2024-12-03
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